Cast header pointer after incrementing

src/primitives/array/array.c

@@ -217,7 +217,7 @@ u8 *_array_alloc_capacity(const Allocator *allocator, u64 capacity, u64 item_siz
     goto RETURN_ARRAY_ALLOC;
   }
 
-  output            = ((u8 *)header) + sizeof(ArrayHeader);
+  output            = (u8 *)(header + 1);
   header->magic     = WAPP_ARRAY_MAGIC;
   header->count     = 0;
   header->capacity  = capacity;